Enclosed circuit breaker



Oct. 11, 1938. J. G. JACKSON ENCLOSED CIRCUIT BREAKER Filed July 1, 1935 T 4 M ML 2 M M J G l m a J/ M V \5 K W 1 Patented Oct. 11, 1938 UNITED STATES PATENT OFFICE 2.18am moms! clam-r John G. Jackson. urist, men, alaignor to Square 1) Company Detroit, Micla, a corporatianolmehigu y am hi, i. ms, Serial No. 29,211 15 Claims. (Cl. 200-50) This invention relates to enclosed automatic extends across the front of the breaker and carelectric circuit breakers and has for its object rips a part I engaging the breaker handle 1. the provision of an improved enclosure for circuit This part I may be U-shaped and extend through breakers. parallel slots in the crank U, being held therein 5 Another objector this invention is to provide y stud I with the less of the U disposed n nis an enclosed automatic circuit breaker with a posite sides 0! the handle I. A side operating pivotal mounting providing for swinging movehandle it is mounted on the free side of the sadment to the exterior of the enclosing bog. die 4 and has operative connection to crank I. Another object 01 this invention is to provide It is, oi course, obvious that the crank 8 and 10 an enclosed automatic circuit breaker with an handle I! may be in rall0 improved operating member. The box wall is provided with a slot which re- Another object of this invention is to provide ceives the handle I! and a stud It also mounted an enclosed automatic circuit breaker having a 0n the Saddle The st d w n t ht n d front operating handle with an operating memdown will secure the saddle 4 within the box I, the

a 1g ber engaging said handle at all tim to prevent side oi the saddle then serving to seal the slot in damage thereto. the box wall.

Another object oi. this invention is to provide a A spring pressed latch i4 is mounted on the box swingable mounting for an enele d automatic wall and extends through a slot in the cover 2 to circuit breakerwith an improved interlock conlatch it in closed Position. struction.

Other obiects and ieatures of this invention o on" p sition w ile th ov r s p n andt will be readily appar nt to those skill d in the art prevent opening of the cover while the breaker from the following specification and appended is n" is pr v d d. i mbodi a P II drawing illustrating certain preferred embodimovable with the saddle 4 and rigidly intercom ments of the invention. This invention is a conn ted with the handle II and crank I. A sectinuation in part of 'my oopending ap lication, 0nd part II is pivctally mounted on the box wall Serial No. 765,265 med November 30, 1934'. nd is sp i p essed as by the sp i 11 toward In the drawing: the part. II. A third part I! oi. the interlock is Figure 1 is a front elevational view of an enrigidly secured to the cover and is adapted to closed circuit breaker according to the' present engage the Dirt I. a swing it w y f m the i invention with the cover broken away to show part II when the cover is in closed position. This internal parts. swinging movement of the part it swings a latch- Figure 2 is a sectional view on the line 11-11 ing portion it into engagement with a hook 2| of Figure 1. on the part II. When the breaker is in "oil'" 36 Figure 3 is an enlarged detail view on the line position in the position shown in Figure 3, the III-I11 of Figure 1 showing the interlock mechopening movement of the cover permits the anism. member II to swing clockwise from the position Figure 4 is a detail view oi the interlock with there shownto disengage the latch II from the the cover open. hook 2i. However, when the breaker is moved to.

40 Figure 5 is a detail sectional .view of the inter- 1 P08114011 e Pa Will be otated co terlock mounting taken on the line V-V of Figure 1. clockwise to a position opp si the rf n The circuit breaker enclosure, accordin to the e p whereupon t e descr bed swin in present invenuqn, m box mm a movement to release the cover will be prevented 4 coverI pivotally mounted thereonasat I; 'Withand the cover locked Wsmmwhen the 4 plvotally mounted as at s to the box wall. The Film 6 4 with the Pm gaged with part I! to prevent movement of the saddle 4 is spaced from the back wall oi the box operating mm d1 e toward on position The I and extends thereacross into engagement with swinging movement of the part It is limited to the opposite side of the A thepositionshown in Figure 4 by a stop 23 on the is rigidly mounted on the saddle 4. This circuit box Wm break" my be 0! W 18 It is thus seen that the saddle 4 and its assohe shown 8 "liable circuit. b ill-V1118 ciated parts including the handle i2 and the intera front pe d han l A ihk I l D v ll y lock part It may be swung to the exterior of the 55 mounted in the opposite sides of the saddle 4 and box when the cover is openedto uncover the box An interlock to prevent operation 0! the breaker m the box is disposed-a humped Male or up cover is opened the interlock parts assume the interior and that when the saddle is sg back within the box the interlock parts i6 and it will be properly engaged. This pivotal mounting for the circuit breaker is particularly adapted for ease in wiring as with the saddle spaced from the back wall of the box (as more particularly shown in Figure 2) to provide a wiring space, the screw 58 may be loosened and the saddle and its associated parts flipped to the exterior of the box, whereupon the wires may be drawn into the box interior and the saddle then readily swung back into the box and the stud i8 tightened to hold the breaker in position within the box.

It is to be noted that the crank 8 always extends in.front of the breaker with its part 9 always in engagement with the handle l to prevent damage thereto.

' To facilitate the swinging movement of the saddle l to the box exterior, the corner thereof remote from the pivotal mounting 5 is provided with a chamfered portion 24 which may be in the form of a rounded curve if desired.

While certain preferred embodiments of the invention have been specifically disclosed, it is understood that the invention is not limited thereto as many variations will be readily apparent to those skilled in the art and the invention is to be given its broadest possible interpretation within the terms of the following claims:

What is claimed is:

1. In an enclosed circuit breaker,-an enclosing box, a cover for said box, a circuit breaker mounted in said box and comprising automatically and manually operable electric circuit breaker mechanism, an enclosure for said mechanism and an operating handle extending through the enclosure, an operating member rotatably mounted on said box, said member having a portion extending over said circuit breaker and carrying a part engaging said handle, said member having a portion extending exteriorly oi the box wall and constituting an outside operating handle, said part comprising a removable element having spaced, depending legs disposed on opposite sides of said circuit breaker handle without positive connection thereto and"operating to move the same in response to movement of said operating member.

'2. In an enclosed circuit breaker, .an enclosing box, a cover for said box, a circuit breaker mounted in said box and comprising automatically and manually operable electric circuit breaker mechanism, an'enclosure for said mechanism and an operating handle extending through the enclosure, a crank rotatably supported on opposite walls of said box and having a portion extending over said circuit breakensaid portion carrying a part engaging said circuit breaker handle, and an having operative connection with said crank, said I greases gaging said handle, saidelement having another portion on the exterior of said box and serving as an outside operating handle.

4i. In an enclosed circuit breaker, an enclosing box, a cover for said box, a supporting member pivotally mounted in said box, a circuit breaker mounted on said member and comprising auto-' matically and manually operable electric circuit breaker mechanism, an enclosure for said mechanism and an operating handle extending through the enclosure, an operatingv element rotatably mounted on said member and having a portion exten over said breaker and carrying means engaging said handle, said element having another portion on the exterior of said box and serving as an outside operating handle, said member, breaker, and element-being bodily swingable to the exterlorof the box, while being attached to d supported on the box when the cover is open.

5. In an enclosed circuit breaker, an enclosing.

box, a cover for said box, a supporting member pivotally mounted in said box for swinging movement to the exterior thereof while attachedto and supported on the box, a circuit breaker mounted on said member and comprising automatically and manually operable electric circuit breaker mechanism, an enclosure for said mechanism and an operating handle extending through the enclosure an operating element rotatably mounted on said member and having a portion extending over said breaker and carrying means engaging said handle, said element having another portion on the exterior of said box and serving :as an outside operating handle, said second portion extending through a slot in the box wall to permit swinging of the member and its supported elements to the exterior of the box.

ment to the exterior thereof while attached to and supported on the box and spaced at least in part from the rear wall of the box, a circuit breaker I handle, "and an outside operating handle mounted on said member and having an operating connection'with said crank.

I. In an enclosed circuit breaker, an enclosing box, a cover for said box, a supporting member pivotally mounted in said box for swinging move- .Outsilde p tinghandle mounted on said box and ment to the exterior thereof while attached to and supported on the box, a circultf breaker.

a t comprising senerellfwshaped element mounted on said member and comprising automovably mounted on said portion and having its legs disposed on opposite sides of said circuit breaker handle.

3. In an enclosed circuit breaker, an enclosing box, a cover for said box, a supportin'gmember .pivotally mounted in said box for swinging movement to the exterior thereof while attached to and supported on the box, a circuit breaker mounted on said member and comprising automatically and manually operable electric circuit breaker mechanism, an enclosure for saidmechanism and an operating handle extending through the enclosure, an operating element rotatably mounted on said member and having a portion extending over said breaker and carrying means enmatically and manually operable electric circuit breaker mechanism, an enclosure for said mechanism and an operating handle extending through the front of the enclosure, a crank rotatably mounted on said member and extending over the front of said breaker and carrying a part engaging said handle, and an outsideoperating and manually operable electric circuit breaker mechanism, an enclosure for said mechanism and an operating handle extending through the front of the enclosure, a crank rotatably mounted on said member and extending over the front of said breaker and carrying a part engaging said handle, and an outside operating handle having operative connection with said crank, said member being provided with a clearance portion remote from the pivotal mounting to provide for swinging. movement to the box exterior. I

9. In an enclosed circuit breaker, an enclosing box, a cover for said box, a supporting member pivotally mounted in said box for swinging movement to the exterior thereof while supported on the box, a circuit breaker mounted on said member and comprising automatically and manually operable electric circuit breaker mechanism, an enclosure for said mechanism and an operating handle extending through the enclosure, an operating element rotatably mounted on said member and having a portion extending over said breaker and carrying means engaging said handle, said element having another portion on the exterior of said box and serving as an outside operating handle, and an interlock comprising a part movable with said element, a second part mounted on the box wall and a third part carried by the cover, said first part being swingable with the member to the box exterior and readily engaging and disengaging with the second part.

10. In an enclosed circuit breaker, an enclosing box, a cover for said box, a U-shaped saddle disposed in said box with the base of the U spaced from the back wall of the box, a circuit breaker mounted on said saddle and comprising automatically and manually operable electric circuit breaker mechanism, an enclosure for said mechanism and an operating handle extending through "the front of the enclosure, and an operating member rotatably mounted on said saddle and having a portion extending over said breaker and carrying a part engaging said handle, said member extending to the exterior of the box and terminating in an operating handle.

11. In an enclosed circuit breaker, an enclosing box, a cover for said box, a U-shaped saddle pivotally mounted in said box, a circuit breaker mounted on said saddle and comprising automatically and manually operable electric circuit breaker mechanism, an enclosure for said mechanism and an operating handle extending through the front of the enclosure, a crank rotatably mounted on said saddle and extending over the front of said breaker and carrying a part engaging said handle, an outside operating handle mounted on said saddle and having operative connection with said crank, said saddle and its associated parts being bodily swingable to the box exterior, said crank extending over said breaker and engaging the breaker handle through said part at all times to Protect said breaker handle against damage.

12. In an industrial type circuit breaker, an enclosing box, a cover for said box, a U-shaped saddle disposed in said box with the base of the U spaced from the back wall of the box, a circuit breaker having a front operating handle mounted on said saddle and an operating member rotatably mounted on said saddle and having a portion extending over said breaker and carrying a part engaging said handle, said member extending to the exterior of the box and terminating in an operating handle, said saddle being pivotally mounted within said box and having a clearance portion remote from said pivot to provide for swinging movement to the exterior of said box.

13. In an enclosed circuit breaker, an enclosing box, a cover for said box, a U-shaped saddle disposed in said box with the base of the U spaced from the back wall of the box, a circuit breaker having a front operating handle mounted on said saddle and an operating member rotatably mounted on said saddle and having a portion extending over said breaker and carrying a part engaging said handle, said member extending to the exterior of the box and terminating in an operating handle, said saddle being pivotally mounted on said box with the corner thereof remote from said pivot chamfered to provide clearance for swinging movement of the saddle.

14. In an enclosed circuit breaker, an enclosing box. a cover for said box, a supporting member pivotally mounted in said box for swinging movement to the exterior thereof, a circuit breaker mounted on said member and having a front operating handle, a crank rotatably mounted on said member and extending over the front of said breaker and carrying a part engaging said handle, an outside operating handle having operative connection with said crank, and an interlock comprising a part carried by said member, a second part carried by said box and a third part carried by said cover.

15. In an enclosed circuit breaker, an enclosing box, a cover for said box, a supporting member pivotally mounted in said box, a circuit breaker mounted on said member and having a front operating handle, a crank rotatably mounted on said member and extending over the front of said breaker and carrying means engaging said handle, an outside operating handle connected to said crank, and an interlock comprising a part rotatable with said outside handle and crank, a second part pivotally mounted on said box and a third part carried by said cover, said first and second parts being readily engageable and disengageable upon swinging movement of said member, said second part preventing rotation of said first part when the cover is open and engaging said third part to prevent opening of said cover when the breaker is closed.

JOHN G. JACKSON. 

